<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <link rel="stylesheet" href="https://cdn.bootcss.com/twitter-bootstrap/4.3.1/css/bootstrap.css">
  <style>
    body{
      max-width: 400px;
      margin: 20px auto;
    }
  </style>
</head>
<body>
  <nav class="nav justify-content-center">
    <a class="nav-link active" href="#">登陆</a>
    <a class="nav-link" href="#">注册</a>
    <a class="nav-link disabled" href="#">忘记密码</a>
  </nav>
  <br>
  <ul class="nav nav-tabs">
    <li class="active"><a href="#">登陆</a></li>
    <li><a href="#">注册</a></li>
    <li><a href="#">忘记密码</a></li>
  </ul>
  <br>
  <div>
    <h1>登陆</h1>
  </div>
  <br>
  <div class="row">
    <div class="col-sx-3">
      <ul class="nav nav-pills nav-stacked">
        <li class="active"><a href="#">登陆</a></li>
        <li><a href="#">注册</a></li>
        <li><a href="#">忘记密码</a></li>
      </ul>
    </div>
    <div class="col-xs-9">
      <h1>登陆</h1>
    </div>
  </div>
  
  
</body>
</html>